RHS 45x20x3 Hiasa · Weight & Dimensions

Hiasa, cold-formed sections · Rectangular Hollow Section

Rectangular Hollow Sections (RHS) are tubular profiles with excellent torsional resistance and aesthetic appeal. Used for columns, trusses, and exposed structural elements.

Also known as: PTR 45x20 cal 11 (México) · Caño estructural 45x20 (Argentina)

The RHS 45x20x3 steel profile weighs 2.6 kg/m (1.75 lb/ft), has a depth of 45 mm (1.77 in), flange width 20 mm (0.79 in). Cross-sectional area: 330.823 mm². Moment of inertia Ix = 7.154 cm⁴, Iy = 1.904 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 3 mm ≈ 11 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Depth (h)	45 mm	1.77 in
Width (b)	20 mm	0.79 in
Thickness (t)	3 mm	0.12 in
Fillet radius (r)	6 mm	0.24 in
Weight	2.6 kg/m	1.75 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	330.82 mm²	0.513 in²
Moment of inertia (Ix)	7.15 cm⁴	0.17 in⁴
Moment of inertia (Iy)	1.9 cm⁴	0.05 in⁴
Elastic section modulus (Sx)	3.18 cm³	0.194 in³
Elastic section modulus (Sy)	1.9 cm³	0.116 in³
Plastic section modulus (Zx)	4.29 cm³	0.262 in³
Plastic section modulus (Zy)	2.37 cm³	0.145 in³
Radius of gyration (rx)	1.47 cm	0.579 in
Radius of gyration (ry)	0.76 cm	0.299 in